EP0454285A1 - Verfahren zur Reinhaltung von Wasser in Fischzuchtbecken sowie hierfür geeignete Fischbecken - Google Patents

Verfahren zur Reinhaltung von Wasser in Fischzuchtbecken sowie hierfür geeignete Fischbecken Download PDF

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Publication number
EP0454285A1
EP0454285A1 EP19910250114 EP91250114A EP0454285A1 EP 0454285 A1 EP0454285 A1 EP 0454285A1 EP 19910250114 EP19910250114 EP 19910250114 EP 91250114 A EP91250114 A EP 91250114A EP 0454285 A1 EP0454285 A1 EP 0454285A1
Authority
EP
European Patent Office
Prior art keywords
water
fish farming
basin
drum filter
fish
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19910250114
Other languages
German (de)
English (en)
French (fr)
Inventor
Knut Dederichs
Axel Dederichs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0454285A1 publication Critical patent/EP0454285A1/de
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/28—Anaerobic digestion processes
    • C02F3/2806—Anaerobic processes using solid supports for microorganisms
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
    • A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
    • B01D33/11—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for outward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/48—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B01D33/50—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/12—Devices for taking out of action one or more units of multi- unit filters, e.g. for regeneration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/06—Aerobic processes using submerged filters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • the invention relates to a method for keeping water clean in fish farming tanks using organic tanks and fish farming tanks suitable for carrying out the method.
  • the water supply for the fish farming tanks designed as long-flow tanks or round tanks takes place in a circulatory process, in which the water passes through an overflow from the fish farming tank into a pre-separator, in which the coarse constituents of the contaminated water are first filtered off, whereupon the water is filtered through a gravel filter performed with several filter stages, so that an ever finer filtration is made possible.
  • trickling filter systems and / or aeration systems and / or immersion systems are used, in which the water contaminated by the decomposition processes with ammonium salts or ammonia is aerobically converted into nitrate using microorganisms and with the addition of oxygen .
  • the invention has for its object to propose a new method for keeping water clean in such fish farming tanks using organic tanks, in which the dirt load of the tanks can be removed more effectively with less environmental pollution and the risk of disease transmission from in an economical and extremely effective manner one to the other basin is reduced and at the same time a better degree of cleanliness is made possible in a simple manner without the use of noisy pumps.
  • a method according to the main claim is therefore proposed, particularly preferred embodiments being mentioned in the subclaims.
  • a fish farming tank suitable for carrying out the method is also proposed, as defined in claim 5, again particularly preferred embodiments being mentioned in the further subclaims.
  • the fish farming pool 2 consists, for example, of polyester or steel and can be provided with a plastic inner shell; for example, it has a fish tank capacity of 4.5 m3 with a diameter of about 2.6 m.
  • the bottom 4 is slightly inclined from the side wall 6 towards the center.
  • overflows or an overflow channel 8 At the edge of the basin there are one or more overflows or an overflow channel 8, which absorb the floating solids in the second horizontally running water cycle or flow.
  • a compressed air lifter 10 is provided in the form of a tube 12 of any size with a diameter of approximately 30 to 50 cm, which is at a distance of approximately 4 to 8 cm from the bottom surface 4 in the lower region.
  • a ventilation device 14 is provided which introduces air or oxygen and thus causes an upward vertical flow in the tube 12.
  • a surge channel which, in conjunction with a curved guide plate 18, ensures that the water conveyed upward by the air flow exits the surge channel.
  • the surge channel 16 extends into a first drum filter, which is arranged radially to the basin and above the water level s and can preferably be inclined by an angle ⁇ in order to compensate for flushing through at different volume flows in the riser and mixing tube 10.
  • the filter drum 20 is mounted on its circumference and is driven there in a manner known per se.
  • the filter drum is covered with a filter cloth made of plastic threads or metal threads with a mesh size of 100 to 250 ⁇ and absorbs the solids with the essentially vertically directed water flow.
  • the filter drum 20 is preferably provided with an escape opening 34 in its circumference, through which small fish initially conveyed high can get back into the fish tank.
  • the opening size depends on the respective fish type or size and generally has an elliptically shaped opening in a range of 10 to 30 cm in length and 2 to 6 cm in width.
  • the filter cloth is stretched on the filter drum in such a way that no internals are provided on the inner circumferential surface which may endanger the health of the fish being transported.
  • a coaxial drainage channel 24 is provided, which extends over the entire length of the drum filter 20 and the bottom surface of which is inclined slightly in the drainage direction beyond the edge of the container and ends in a drain pipe 26.
  • a scraper 28 is preferably arranged coaxially to this drainage channel, with which the deposits that accumulate over time are scraped off and fall into the drainage channel 24.
  • a spray device 30 with spray nozzles 32 is provided above the gutter and outside the first drum filter 20, which is preferably actuated intermittently in order to clean the filter cloth.
  • the rinsing water from the spray nozzles 32 only cleans the area of the filter cloth above the drainage channel 24, so that the dirt can be removed via the drain pipe 26.
  • the pollutants or foreign substances discharged with the second water circuit by a horizontal flow in the surface area of the basin through the overflow 8 reach a second drum filter 46, which is arranged above the first biochamber 44 of the bio basin 40.
  • This second drum filter is made with a similar filter cloth made of plastic filaments or metal threads and has a mesh size of 40 to 80 ⁇ .
  • this second drum filter can also be provided with a scraper, a drainage channel and a spray device in order to remove the solids accumulated in the filter.
  • the bio-basin consists of several chambers 44 with fixed bed reactors, which are coated with corresponding microorganisms for nitrification. Ventilation candles 42 are arranged beneath the individual chambers or fixed bed reactors and provide the oxygen required for biodegradation.
  • the chambers or fixed bed reactors 44 are connected to one another and constructed in such a way that they are flowed through one after the other from bottom to top and the other from top to bottom. For example, the water from the overflow 8 of the second water circuit after mechanical removal of solids in the second drum filter enters the first bio-chamber and from there passes through about six further chambers into an empty chamber 48, in which a further compressed air lifter 50 is located returns the biologically purified water to the fish farm.
  • the biochambers through which flow flows from bottom to top preferably have an aerator candle 42 for oxygen enrichment and flow support; Here the nitrification takes place due to the high oxygen supply.
  • the flow through the biochambers from top to bottom has no aerator candles, so that the denitrification takes place here due to the lower oxygen content.
  • a heating unit and an inlet for fresh water additive are expediently provided in this empty chamber, the latter being actuated by means of a float switch.
  • the basin content of the bio-pool is approximately 2.2 m3, has a basin area of approximately 2.5 x 1.25 m and the fixed bed reactors have a specific surface area of 200 m2 / m3.
  • the first water circuit with its vertical flow thus represents an internal water circuit with a circulating capacity of around 150 to 350 1 / min, while the second water circuit with a horizontal flow as an external water circuit is at a circulating capacity of around 10 to 50 1 / min.
  • the blower output (Air) is around 30 to 60 m3 / h with a pressure difference of around 160 mbar.
  • the biodegradation of the dissolved substances and solids is limited to less than 50 ⁇ .
  • the proportion of remaining solids is less than 0.1 ml / l, which reduces the health effects of the fish to a minimum, for example due to gill inflammation due to suspended matter.
  • the compressed air lifter causes the oxygen supply on the one hand and the flow of the two water circuits on the other, whereby pumps with their noises affecting the fish are avoided and generally lead to better economy of the system due to this double effect.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Microbiology (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Animal Husbandry (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Farming Of Fish And Shellfish (AREA)
EP19910250114 1990-04-26 1991-04-25 Verfahren zur Reinhaltung von Wasser in Fischzuchtbecken sowie hierfür geeignete Fischbecken Withdrawn EP0454285A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19904013226 DE4013226C1 (es) 1990-04-26 1990-04-26
DE4013226 1990-04-26

Publications (1)

Publication Number Publication Date
EP0454285A1 true EP0454285A1 (de) 1991-10-30

Family

ID=6405078

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910250114 Withdrawn EP0454285A1 (de) 1990-04-26 1991-04-25 Verfahren zur Reinhaltung von Wasser in Fischzuchtbecken sowie hierfür geeignete Fischbecken

Country Status (3)

Country Link
EP (1) EP0454285A1 (es)
DE (1) DE4013226C1 (es)
PT (1) PT97502A (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014009984A1 (de) 2014-07-04 2016-01-07 Ulrich Spranger Verfahren und Vorrichtung zur Reinigung der Innenflächen von Rundbehältern

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19623229C2 (de) * 1996-06-11 1998-07-23 Arnim Liekweg Wasserkreislauf-Betriebssystem für Aquarien
DE202009018027U1 (de) * 2009-04-17 2010-11-18 Schmid, Christian Filtervorrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3888210A (en) * 1972-02-22 1975-06-10 Marine Protein Corp Fish husbandry system utilizing at least partial recirculation of water
CH654171A5 (fr) * 1983-03-11 1986-02-14 Cyril Piguet Aquarium.
DE3628909A1 (de) * 1985-08-28 1987-06-25 Sienknecht Tief & Wasserbau Verfahren zur biologischen abwasserreinigung und mehrkammeranlage zur ausuebung des verfahrens

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3888210A (en) * 1972-02-22 1975-06-10 Marine Protein Corp Fish husbandry system utilizing at least partial recirculation of water
CH654171A5 (fr) * 1983-03-11 1986-02-14 Cyril Piguet Aquarium.
DE3628909A1 (de) * 1985-08-28 1987-06-25 Sienknecht Tief & Wasserbau Verfahren zur biologischen abwasserreinigung und mehrkammeranlage zur ausuebung des verfahrens

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014009984A1 (de) 2014-07-04 2016-01-07 Ulrich Spranger Verfahren und Vorrichtung zur Reinigung der Innenflächen von Rundbehältern

Also Published As

Publication number Publication date
PT97502A (pt) 1993-07-30
DE4013226C1 (es) 1991-08-22

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